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On Mon, 20 Oct 2008 11:43:18 -0700, "charlie"
wrote:


wrote in message
. ..

Any suggestions for lubricating O-Rings that are used for water
pumps,
basically I want to extend useful life as much as possible. Someone
suggested lithium grease?

SD

Petroleum Jelly (Vaseline)

I don't think so---will eventually ruin the O ring
mld

I do. Petroleum and Butyl rubber are completely compatible.
Use of Vaseline on Buna-n O-rings is a standard procedure.

the manual for my pool pump said to use silicone grease. i know rtfm is
against the guy rules though....

You can use silicone grease but it is more costly and really isn't
needed. What would you rather ingest? Vaseline or Silicone?
Have you ever tried to get rid of a Silicone residual when trying
to paint?

neither, but silicone is inert and vaseline is oil based. you can buy a tube
of it in an auto parts store for about the same price as a tub of vaseline.
look for boat trailer bearing grease.

i have also read that some o-rings will disintegrate if used with oil based
lubricants; manuals explicitly state not to use it on some pumps that i
have. i can't tell the difference between materials of o-rings and would
rather not risk it.

you paint the inside of your pumps?